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SCFs

In gas reservoir engineering, the gas expansion factor, E, is commonly used. However, in oil reservoir engineering it is often more convenient to refer to the gas formation volume factor which is the reciprocal E, and is expressed in units of scf/stb (using field units). The reason for this will become apparent in Section 8. [Pg.107]

As the reservoir pressure drops from the initial reservoir pressure towards the bubble point pressure (PJ, the oil expands slightly according to its compressibility. However, once the pressure of the oil drops below the bubble point, gas is liberated from the oil, and the remaining oil occupies a smaller volume. The gas dissolved in the oil is called the solution gas, and the ratio of the volume gas dissolved per volume of oil is called the solution gas oil ratio (Rg, measured in scf/stb of sm /stm ). Above the bubble point, Rg is constant and is known as the initial solution gas oil ratio (Rgj), but as the pressure falls below the bubble point and solution gas is liberated, Rg decreases. The volume of gas liberated is (Rg - Rg) scf/stb. [Pg.110]

If the reservoir pressure remains above the bubble point then any gas liberated from the oil must be released in the tubing and the separators, and will therefore appear at the surface. In this case the producing gas oil ratio (Rp) will be equal to R. i.e. every stock tank barrel of oil produced liberates Rs scf of gas af surface. [Pg.111]

For an offshore field, recoverable volumes of less than 0.5 trillion scf (Tcf) are typically uneconomic to develop. This would equate to an oil field with recoverable reserves of approximately 80 MMstb. [Pg.193]

Douketis C, Socles G, Marchetti S, Zen M and Thakkar A J 1982 Intermolecular forces via hybrid Hartree-Fock SCF plus damped dispersion (HFD) energy calculations. An improved spherical model J. Chem. Phys. 76 3057... [Pg.216]

Price S L and Stone A J 1980 Evaluation of anisotropic model intermolecular pair potentials using an ab initio SCF-CI surface Moi. Phys. 40 805... [Pg.217]

Figure B3.1.4. Fluctuation and mean-field SCF potentials for a 2s electron in Be. Figure B3.1.4. Fluctuation and mean-field SCF potentials for a 2s electron in Be.
On the ordinate, two quantities are plotted (i) the mean-field potential between the second electron and the other 1 s electron computed, via the self-consistent field (SCF) process (described later), as the interaction of... [Pg.2160]

The SCF mean-field potential takes care of most of the interactions among the A electrons. However, for all... [Pg.2163]

Coulomb repulsion by occupying different r giom of space in the SCF picture Is 2s, both electrons reside in the same 2s region of space. In this particular example, the electrons undergo angular correlation to avoid one another. [Pg.2165]

To overcome some of the problems inlierent in the UFIF method, it is possible to derive SCF equations based on minimizing the energy of a wavefiinction fomied by spin projecting a single Slater detemiinant starting... [Pg.2168]

More recently, the Duiming group has focused on developing basis sets that are optimal not for use in SCF-level calculations on atoms and molecules, but that have been optimized for use in correlated calculations. These so-called correlation-consistent bases [43] are now widely used because more and more ab initio calculations are being perfonned at a correlated level. [Pg.2171]

In this approach [ ], the LCAO-MO coefficients are detemiined first via a smgle-configuration SCF calculation or an MCSCF calculation using a small number of CSFs. The Cj coefficients are subsequently detemiined by making the expectation value ( P // T ) / ( FIT ) stationary. [Pg.2176]

This method [ ] uses the single-configuration SCF process to detennine a set of orbitals ( ).]. Then, using an unperturbed Flamiltonian equal to the sum of the electrons Fock operators // = 2 perturbation... [Pg.2177]

In the MPPT/MBPT method, once the reference CSF is chosen and the SCF orbitals belonging to this CSF are detennined, the wavefiinction T and energy E are detennined in an order-by-order maimer. The perturbation equations determine what CSFs to include and their particular order. This is one of the primary strengdis of this technique it does not require one to make fiirtlier choices, in contrast to the MCSCF and Cl treatments where one needs to choose which CSFs to include. [Pg.2177]

One fomis a reference wavefunction T (this can be of the SCF, MPn, CC, etc variety) tlie energy differences are computed relative to the energy of this fiinction. [Pg.2188]

The olassio papers in whioh the SCF equations for olosed- and open-shell systems are treated are ... [Pg.2194]

Csizmadia I G, Flarrison M C, Moscowitz J Wand Sutcliffe B T 1966 Commentationes. Non-empirical LCAO-MO-SCF-Cl calculations on organic molecules with Gaussian type functions. Part I. Introductory review and mathematical formalism Theoret. Chim. Acta 6 191-216... [Pg.2195]


See other pages where SCFs is mentioned: [Pg.95]    [Pg.96]    [Pg.107]    [Pg.111]    [Pg.111]    [Pg.112]    [Pg.115]    [Pg.154]    [Pg.154]    [Pg.184]    [Pg.193]    [Pg.206]    [Pg.206]    [Pg.33]    [Pg.33]    [Pg.34]    [Pg.2162]    [Pg.2163]    [Pg.2164]    [Pg.2167]    [Pg.2169]    [Pg.2173]    [Pg.2173]    [Pg.2173]    [Pg.2174]    [Pg.2175]    [Pg.2175]    [Pg.2176]    [Pg.2177]    [Pg.2178]    [Pg.2186]    [Pg.2189]   
See also in sourсe #XX -- [ Pg.587 , Pg.588 ]




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A symmetry-adapted SCF method

Ab initio MO SCF

Ab initio SCF

Ab-initio SCF calculation

Alkylation, SCFs

Alternative Derivation of the SCF Theory

Ammonia via SCF

Analytical SCF theory

Applications of SCF Electrochemistry

Approximate SCF-MO Methods

Avoiding the Diagonalization Step—Density Matrix-Based SCF

Basic principles of SCF semiempirical

Basic principles of SCF semiempirical methods

CAS SCF calculations

CAS SCF method

CAS-SCF function

CASSCF.,Complete active space SCF

COST OF OWNERSHIP FOR SCF CLEANING SYSTEMS

Catalysis in SCFs

Catalyst Immobilization using SCFs as the Only Mass-Separating Agent

Charge-transfer and SCF Deformation

Chemical Shifts of Solutes in SCFs

Classical MC SCF approach

Closed shell SCF calculation

Comparison of EHMO and SCF Results on Polyacetylene

Comparison of SCF and MD for SOPC Membranes

Complete active space SCF method

Computer Time Saving in the SCF Procedure

Considerations for NMR in SCFs

Considerations on the SCF Scheme

Convergence, SCF

Correlation by Multiconfigurational SCF Methods

Density matrix-based SCF

Density of SCF

Derivative SCF equations

Direct SCF

Direct SCF calculation

Direct SCF method

Discovery of SCFs and their Use as Solvents

Discretization and Solution of the SCF equations

Early Examples of Chemical Reactions in SCFs

Electron Correlation and Post-SCF Methods

Enzymes, in SCFs

Examples of the Reactions in SCFs

Formal Derivation of the SCF Equations

Fracture toughness of SCF-reinforced composites

Fragment SCF method

GIAO-SCF method

Gaseous miscibility with SCFs

Gaussian Functions Basis Set Preliminaries Direct SCF

Hartree SCF method

Hartree-Fock SCF calculations

Hartree-Fock self consistent field HF-SCF)

Hartrees Self-Consistent Field (SCF) Method

Heat Transfer in Stirred Vessel with SCFs

Heterogeneous SCFs reactions

Homogeneous SCFs reactions

How to Safely Change the SCF Procedure

Hybrid variation-perturbation decomposition of SCF interaction energy

Hydrogen miscibility with SCFs

In-core SCF

Industrial Use of SCFs as Reaction Media

Interpretation of the LCAO-MO-SCF Eigenvalues

LCAO MO SCF

LCAO SCF molecular orbitals

LCAO-MO-SCF calculations

LCAO-MO-SCF equation

LCAO-SCF molecular orbital

Liquid-SCF Systems

Local SCF and analogous methods

MC SCF calculations

MC-SCF

MC-SCF theory

Matrix-Based Coupled Perturbed SCF (D-CPSCF)

Matrix-Based Quadratically Convergent SCF (D-QCSCF)

Model of the SCF in Complex With E2 and Substrates

Monitoring of Fast Reactions in SCFs using Time-resolved Vibrational Spectroscopy

Multi-Configuration SCF

Multi-configurational SCF

Multiconfiguration Dirac-Fock SCF

Multiconfiguration SCF (MCSCF)

Multiconfiguration SCF Theory

Multiconfiguration SCF calculations

Multiconfiguration SCF method

Multiconfiguration self-consistent field MC.SCF)

Multiconfigurational SCF

Multiconfigurational SCF method

Multiconfigurational SCF theory

Multiconfigurational Self-Consistent Field method (MC SCF)

Multiphase Catalysis Using SCFs as Solvents

Non-polar SCF

Numeric SCF model

Numerical solution of SCF equations

Onsager Coefficients and Dynamic SCF Theory (DSCFT)

Oxidations, SCFs

Polar SCFs

Polymerization in SCFs

Possible Results of an SCF Procedure

Post-SCF

Post-SCF calculations

Post-SCF methods

Practical problems in the SCF LCAO MO method

Quadratically convergent SCF

RAS SCF, (

RHF/SCF calculations

Reactions in SCF

Reactions in SCFs

Reactive SCFs

Relativistic MC-SCF

Relativistic MC-SCF in terms of DPT

Relaxation and Linewidth Studies in SCFs

Response Properties at the SCF Level

Restricted active space SCF

Roothaan SCF equation

SCF

SCF

SCF Applicability

SCF E3 complex

SCF Energies

SCF Hartree-Fock

SCF IL Biphasic Systems

SCF Iteration

SCF LCAO

SCF LCAO CO equations

SCF Methods and Two-Electron Integral Screening

SCF Raman

SCF Solvent

SCF Stability Calculations

SCF Techniques

SCF Wave Functions for Diatomic Molecules

SCF approach

SCF approximation

SCF calculations

SCF carbon dioxide

SCF complete active-space

SCF complex

SCF components

SCF density

SCF derivatives

SCF energy gradients

SCF equations

SCF extraction

SCF frequencies

SCF level of theory

SCF method

SCF model

SCF molecular orbitals

SCF multiconfiguration

SCF orbital energy

SCF orbitals

SCF perturbation theory

SCF procedures

SCF structure

SCF studies

SCF substrates

SCF technologies

SCF theory

SCF wavefunctions

SCF-CI calculations

SCF-MO method

SCF-Xa-SW calculation

SCF-limit

SCF-reinforced composites

SCF/ calculations on the

SCFs and Ionic Liquids

SCFs and Water

Sample SCF Separations

Scandium fluoride (ScF

Scf molecular orbital calculations

Selection for commercial SCF food

Selection for commercial SCF food processing plants

Self-Consistent Field (SCF) Theory Saddle Point Integration in U and

Self-consistent field methods (SCF

Self-consistent field molecular orbitals (SCF

Single determinant SCF

Single-Phase Catalysis Using SCFs as Solvents

Solid-SCF system

Solubility in SCF

Solubility of solids in SCFs

Solvent Properties of SCFs

Some Basics of SCF Theory

Special Case The SCF Gradient Formula

Supercritical fluid [SCF

Supercritical fluids polar SCFs

The Basic Principles of SCF Semiempirical Methods

The Hartree SCF Method

The Hartree-Fock-Roothaan SCF Equation

The Hartree-Fock-Roothaan method (SCF LCAO MO)

The LCAO-MO-SCF Equation

The PPP-SCF

The SCF Case

The SCF Component of TAE

The SCF E3 Superfamily

The SCF Limit

The SCF MO Treatment of

The SCF MO Treatment of Methane, Ethane, and Ethylene

The SCF MO Treatment of Polyatomic Molecules

The SCF Solution

The SCF Total Electronic Energy

The SCF Ubiquitin E3 Ligase

The SCF procedure

The SCF-LCAO-MO Method and Extensions

The basic principles of SCF SE methods

The matrix SCF equations

Time-dependent SCF

Transition-state Theory Applied to SCFs

Two configuration SCF

Use for SCF studies

Version 1 of the SCF code

Water via SCF

Water-in-SCF microemulsions

What is a Supercritical Fluid (SCF)

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